- 1(current)
Q. No.Consider the given two statements:
Statement I: Troponin and tropomyosin are regulatory proteins attached to actin filaments.
Statement II: Troponin has binding sites for Ca²⁺ ions, which when occupied expose the active sites on myosin
1. Both I and II are correct
2. Both I and II are incorrect
3. I correct, II incorrect
4. I incorrect, II correct
Statement I: Troponin and tropomyosin are regulatory proteins attached to actin filaments.
Statement II: Troponin has binding sites for Ca²⁺ ions, which when occupied expose the active sites on myosin
1. Both I and II are correct
2. Both I and II are incorrect
3. I correct, II incorrect
4. I incorrect, II correct
Subtopic: Skeletal Muscle: Myofilaments |
Level 3: 35%-60%
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Muscle fibres appear striated due to the alternating arrangement of:
1. Z and M lines
2. A and I bands
3. H zone and Z line
4. Actin alone
1. Z and M lines
2. A and I bands
3. H zone and Z line
4. Actin alone
Subtopic: Skeletal Muscle: Myofilaments | Muscle |
87%
Level 1: 80%+
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The active sites for myosin on actin filaments are masked by:
1. Tropomyosin and troponin complex
2. Myoglobin
3. Meromyosin
4. ATP
1. Tropomyosin and troponin complex
2. Myoglobin
3. Meromyosin
4. ATP
Subtopic: Skeletal Muscle: Myofilaments | Muscle |
96%
Level 1: 80%+
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The globular head of myosin is enzymatically active because it has:
1. Actin binding sites only
2. ATPase activity and ATP binding sites
3. Calcium binding sites
4. Troponin
1. Actin binding sites only
2. ATPase activity and ATP binding sites
3. Calcium binding sites
4. Troponin
Subtopic: Skeletal Muscle: Myofilaments |
96%
Level 1: 80%+
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- 1(current)
Q. No.
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